Magneto-optical recording using short-pulsed laser irradiation
Review articleOpen access
Abstract:

Short-pulsed laser irradiation was used to reduce thermal interaction in the writing process of high-density magnetooptical recording. Irradiation for durations of less than 10 ns was found to be effective in minimizing in-plane thermal diffusion during the irradiation and in suppressing the interaction between marks separated by a distance wider than the beam spot size. Durations of the order of 1 ns, however, were not short enough to suppress thermal difĂ­usion in the thickness direction of current media, and as a result the cooling process after the irradiation was not fast enough to suppress thermal interaction between marks with smaller spacings. It is suggested that the cooling rate can be improved by using a thicker active layer.

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